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Wyszukujesz frazę "Sanchez, M." wg kryterium: Autor


Tytuł:
Involvement of plastid, mitochondrial and nuclear genomes in plant-to-plant horizontal gene transfer
Autorzy:
Sanchez-Puerta, M.V.
Powiązania:
https://bibliotekanauki.pl/articles/57778.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
angiosperm
plastid
mitochondrial genome
nuclear genome
genome
horizontal gene transfer
gene conversion
parasite
Opis:
This review focuses on plant-to-plant horizontal gene transfer (HGT) involving the three DNA-containing cellular compartments. It highlights the great incidence of HGT in the mitochondrial genome (mtDNA) of angiosperms, the increasing number of examples in plant nuclear genomes, and the lack of any convincing evidence for HGT in the well-studied plastid genome of land plants. Most of the foreign mitochondrial genes are non-functional, generally found as pseudogenes in the recipient plant mtDNA that maintains its functional native genes. The few exceptions involve chimeric HGT, in which foreign and native copies recombine leading to a functional and single copy of the gene. Maintenance of foreign genes in plant mitochondria is probably the result of genetic drift, but a possible evolutionary advantage may be conferred through the generation of genetic diversity by gene conversion between native and foreign copies. Conversely, a few cases of nuclear HGT in plants involve functional transfers of novel genes that resulted in adaptive evolution. Direct cell-to-cell contact between plants (e.g. host-parasite relationships or natural grafting) facilitate the exchange of genetic material, in which HGT has been reported for both nuclear and mitochondrial genomes, and in the form of genomic DNA, instead of RNA. A thorough review of the literature indicates that HGT in mitochondrial and nuclear genomes of angiosperms is much more frequent than previously expected and that the evolutionary impact and mechanisms underlying plant-to-plant HGT remain to be uncovered.
Źródło:
Acta Societatis Botanicorum Poloniae; 2014, 83, 4
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Carapace bone histology in the giant pleurodiran turtle Stupendemys geographicus: phylogeny and function
Autorzy:
Scheyer, T M
Sanchez-Villagra, M.R.
Powiązania:
https://bibliotekanauki.pl/articles/20658.pdf
Data publikacji:
2007
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
bone histology
Pleurodira
phylogenesis
bone analysis
Miocene
Stupendemys geographicus
Pelomedusoides
bone microstructure
giant pleurodiran turtle
Testudines
Bothremydidae
Podocnemidae
paleontology
Opis:
Stupendemys geographicus (Pleurodira: Pelomedusoides: Podocnemidae) is a giant turtle from the Miocene of Venezuela and Brazil. The bone histology of the carapace of two adult specimens from the Urumaco Formation is described herein, one of which is the largest of this species ever found. In order to determine phylogenetic versus scaling factors influencing bone histology, S. geographicus is compared with related podocnemid Podocnemis erythrocephala, and with fossil and Recent pelomedusoides taxa Bothremys barberi, Taphrosphys sulcatus, “Foxemys cf. F. mechinorum”, and Pelomedusa subrufa. Potential scaling effects on bone histology were further investigated by comparison to the Pleistocene giant tortoise Hesperotestudo (Caudochelys) crassiscutata and the Late Cretaceous marine protostegid turtle Archelon ischyros. A diploe structure of the shell with well developed external and internal cortices framing interior cancellous bone is plesiomorphic for all sampled taxa. Similarly, the occurrence of growth marks in the shell elements is interpreted as plesiomorphic, with the sampled neural elements providing the most extensive record of growth marks. The assignment of S. geographicus to the Podocnemidae was neither strengthened nor refuted by the bone histology. A reduced thickness of the internal cortex of the shell elements constitutes a potential synapomorphy of the Bothremydidae. S. geographicus and H. crassiscutata both express extensive weight−reduction through lightweightconstruction while retaining form stability of the shell. The bone histology of A. ischyros presents features likely related to an open marine lifestyle.
Źródło:
Acta Palaeontologica Polonica; 2007, 52, 1
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
EDAS (Egnos Data Access Service) differential GNSS corrections: a reliable free-of-charge alternative for precision farming in Europe
Autorzy:
Vázquez, J.
Lacarra, E.
Morán, J.
Sánchez, M. A.
González, A.
Bruzual, J.
Rioja, J.
Powiązania:
https://bibliotekanauki.pl/articles/320569.pdf
Data publikacji:
2019
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
GNSS
Galileo
EDAS
tracking
firefighting
multisensor
fusion
communication optimization
Opis:
EDAS (EGNOS Data Access Service) is the EGNOS internet broadcast service, which provides free of charge access to the data collected and generated by the EGNOS infrastructure. EDAS disseminates over the Internet, both in real time and via an FTP archive, the raw data of the GPS, GLONASS (no commitment on GLONASS data is provided (1)) and EGNOS GEO satellites collected by the receivers located at the EGNOS reference stations, which are mainly distributed over Europe and North Africa. The EDAS services offer several types of GNSS data in various protocols and formats, such as DGNSS corrections. This paper reports on the results of some in-field tests conducted by ESSP and Topcon Agriculture to confirm the suitability of EDAS DGNSS corrections for precision farming in Europe. The European Commission (EC) is the owner of EGNOS system (including EDAS) and has delegated the exploitation of EGNOS to the European GNSS Agency (GSA). EDAS service provision is performed by ESSP, as EGNOS Services Provider, under contract with the GSA, the EGNOS program manager. In the ENC 2018 article “EDAS (EGNOS Data Access Service): Differential GPS corrections performance test with state-of-the-art precision agriculture system”, ESSP and Topcon Agriculture presented the results of the first in-field test conducted in a dynamic and real-life environment in the summer of 2017. The test results indicated that the EDAS DGNSS corrections could enable a reliable pass-to-pass accuracy performance for a wide range of precision agriculture applications and become an attractive solution for cereal farms, when the farm is located in the vicinity of an EGNOS reference station. In particular, Topcon Agriculture acknowledged that the observed performance was sufficient to support the following precision agriculture applications: spraying and spreading of any crop type, tilling and harvesting of cereal. Then, ESSP and Topcon Agriculture engaged in additional testing activities to further characterise the EDAS DGPS performance in different scenarios (i.e. at various European locations and with a variety of distances between the designated farm and the target EGNOS reference station). In each test, multiple runs with the rover tractors have been performed over the reference patterns predefined in the Topcon guidance systems. Data recorded during the tests has been analysed in detail, looking at the key performance indicators (e.g. cross track error and pass-to-pass performance) that characterize the EDAS DGPS performance for precision agriculture applications. Different techniques for the computation of the pass-to-pass accuracy performance have been used, including a procedure to measure live in the field and a post-processing alternative. The diversity of scenarios available allows drawing conclusions on the applicability of EDAS DGPS corrections (in terms of maximum distance from the target EGNOS station) for precision agriculture and also understanding the impact of operationally relevant aspects such as the quality of the mobile internet coverage (highly variable across Europe). The EDAS system and its architecture, the main types of data disseminated through EDAS services and the online information available to the EDAS users are introduced in this paper. In particular, the EDAS Ntrip service is described in detail, since it provides the differential corrections to the GPS and GLONASS satellites at the EGNOS reference stations in RTCM format, which are the basis for the present study. The article also reports on the results of the latest tests, which have been performed using Topcon receivers, vehicles and auto-steering systems. In all cases, two different Topcon guidance systems on board tractors were running simultaneously to assess the EDAS DGPS positioning performance with respect to a the reference provided by a top-performing RTK-based Topcon solution. The objective of this paper is to draw conclusions on the use of EDAS DGPS corrections as a reliable free-of-charge alternative for precision farming in Europe (especially for cereal farms), based on the available performance results from the testing campaign and the feedback from the involved precision agriculture experts.
Źródło:
Annual of Navigation; 2019, 26; 46-58
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Off-Diagonal Magnetoimpedance Dependence of Magnetostriction and Anisotropy in Co-Based and Fe-Based Amorphous Ribbons
Autorzy:
Sánchez, T.
García, J.
Santos, J.
Escoda, Ll.
Prida, V.
Sánchez, M.
Suñol, J.
Hernando, B.
Powiązania:
https://bibliotekanauki.pl/articles/1507012.pdf
Data publikacji:
2010-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.30.Gw
75.50.Kj
75.60.Ch
Opis:
The object of this work is the comparison of domain structure and off-diagonal magnetoimpedance effect in amorphous ribbons with different magnetostriction coefficient. The $Co_{66}Fe_4Ni_1Si_{15}B_{14}$ and $Fe_{80}B_{20}$ samples were obtained by melt-spinning. During the quenching procedure a 0.07 T transverse magnetic field was applied to some of the samples. Domain patterns obtained by the Bitter technique confirm that the differences on the samples are related to the different anisotropy and magnetostriction coefficient, and the quenching procedure. Small changes on the anisotropy distribution and the magnetostriction coefficient can be detected by the off-diagonal impedance spectra as a consequence of the different permeability values of the samples.
Źródło:
Acta Physica Polonica A; 2010, 118, 5; 756-758
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Susceptibility Spectroscopy in FeNiSiB Microwires
Autorzy:
Olivera, J.
Gamcova, J.
Varga, R.
Santos, J.
Prida, V.
Sanchez, M.
Hernando, B.
Zhukov, A.
Powiązania:
https://bibliotekanauki.pl/articles/1813592.pdf
Data publikacji:
2008-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Kj
75.60.Jk
Opis:
Here, we present the study on the influence of the Ni content on the magnetization processes of the amorphous glass-coated $Fe_{77.5-x}Ni_xSi_{7.5}B_{15}$ (x = 0-40) microwires. Measurement of the amplitude dependence of the complex susceptibility was used to observe the magnetization process. It is shown that the magnetization process in the presented samples runs mainly through the domain wall motion.
Źródło:
Acta Physica Polonica A; 2008, 113, 1; 155-158
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Presence of the Asian horse Sinohippus in the Miocene of Europe
Autorzy:
Salesa, M J
Sanchez, I.M.
Morales, J.
Powiązania:
https://bibliotekanauki.pl/articles/22447.pdf
Data publikacji:
2004
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
browser
Anchitheriinae
Asian horse
Miocene
horse
Antchitherium
Mammalia
Europe
Sinohippus
Spain
paleontology
Opis:
The Anchitheriinae are a group of browsing horses with a widespread distribution throughout the Miocene. The subfamily includes the genera Hypohippus, Megahippus, Kalobatippus, Anchitherium, and Sinohippus. In the present paper we compare the remains of a giant anchitherine from the Spanish site of Nombrevilla−1, “Anchitherium” sampelayoi, with other species of Anchitherium from Europe, the North American genera Megahippus and Hypohippus, and the Asian genus Sinohippus. These comparisons allow us to suggest the inclusion of this large Spanish browsing horse in the Asian genus Sinohippus, rather than in Anchitherium. This proposal is made on the basis of some morphological traits from the upper cheek teeth of the Nombrevilla−1 fossils, and their large size, which clearly is outside the range of all other known European Anchitherium.
Źródło:
Acta Palaeontologica Polonica; 2004, 49, 2
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Isolation and purification of malate dehydrogenase in helminth parasites
Izolacja i oczyszczanie dehydrogenazy jabłczanowej robaków pasożytniczych
Autorzy:
Sanchez-Moreno, M.
Tejada, P.
Garcia-Ruiz, M.A.
Monteoliva, M.
Powiązania:
https://bibliotekanauki.pl/articles/836358.pdf
Data publikacji:
1988
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
isolation
purification
malate dehydrogenase
helminth parasite
parasite
Ascaris suum
Hymenolepis microstoma
Moniezia expansa
Opis:
Z homogenatów Ascaris suum, Fasciola hepatica i Moniezia expansa izolowano i oczyszczano dehydrogenazę jabłczanową (E.C.1.1.1.37) zarówno rozpuszczalną, jak i mitochondrialną, stosując wielokrotne, frakcjonowane wirowanie, a następnie chromatografię kolumnową na celulozie - DE-22 DEAE. W homogenatach wszystkich trzech pasożytów stwierdzono wysoką aktywność obu postaci MDH. Maksimum aktywności w przypadku A. suum i F. hepatica wyrażało się dwoma wierzchołkami, a w przypadku M. expansa jednym dla aktywności m-MDH i dwoma wierzchołkami dla s-MDH (ryc.). Stopień czystości obydwu postaci MDH okazał się różny, zależnie od gatunku pasożyta. Autorzy, na podstawie uzyskanych wyników, rozważają szlaki przemian energetycznych w organizmach badanych gatunków pasożytów.
Źródło:
Annals of Parasitology; 1988, 34, 2
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Isolation and purification of malate dehydrogenase in helminth parasites
Izolacja i oczyszczanie dehydrogenazy jabłczanowej robaków pasożytniczych
Autorzy:
Sanchez-Moreno, M.
Tejada, P.
Garcia-Ruiz, M.A.
Monteoliva, M.
Powiązania:
https://bibliotekanauki.pl/articles/2152590.pdf
Data publikacji:
1988
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
isolation
purification
malate dehydrogenase
helminth parasite
parasite
Ascaris suum
Hymenolepis microstoma
Moniezia expansa
Opis:
Z homogenatów Ascaris suum, Fasciola hepatica i Moniezia expansa izolowano i oczyszczano dehydrogenazę jabłczanową (E.C.1.1.1.37) zarówno rozpuszczalną, jak i mitochondrialną, stosując wielokrotne, frakcjonowane wirowanie, a następnie chromatografię kolumnową na celulozie - DE-22 DEAE. W homogenatach wszystkich trzech pasożytów stwierdzono wysoką aktywność obu postaci MDH. Maksimum aktywności w przypadku A. suum i F. hepatica wyrażało się dwoma wierzchołkami, a w przypadku M. expansa jednym dla aktywności m-MDH i dwoma wierzchołkami dla s-MDH (ryc.). Stopień czystości obydwu postaci MDH okazał się różny, zależnie od gatunku pasożyta. Autorzy, na podstawie uzyskanych wyników, rozważają szlaki przemian energetycznych w organizmach badanych gatunków pasożytów.
Źródło:
Wiadomości Parazytologiczne; 1988, 34, 2; 113-124
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sociocultural valuation of ecosystem services in protected areas: A study applied to Southeast Spain
Autorzy:
López-Felices, Belén
Schoenemann, Marina
Román-Sánchez, Isabel M.
Aznar-Sánchez, José A.
Powiązania:
https://bibliotekanauki.pl/articles/39828080.pdf
Data publikacji:
2023
Wydawca:
Instytut Badań Gospodarczych
Tematy:
policy support
protected area
natural resources management
behavioural economics
stakeholders
sustainable development
Opis:
Research background: Protected areas (PAs) play a fundamental role in the maintenance of ecosystem processes and in the flow of ecosystem services (ESs) they provide. However, the management of PAs is complex due to the existence of different stakeholders with disparate and, often, opposed preferences and valuations. The sociocultural assessment of ESs contributes to optimizing the management of scarce resources based on the preferences of the different stakeholders, taking into account the economic, environmental and social dimensions of the analysed area. Purpose of the article: In this work, a sociocultural assessment of the ESs provided by a PA in southeast Spain is carried out. The objective is to identify which the various ESs provided by this PA are and to establish their degree of importance for all the stakeholders involved. Methods: For this, different complementary methodologies have been used in successive phases, both qualitative and quantitative. Specifically, a literature review, in-depth interviews and an assessment questionnaire were used. Findings & value added: Based on the results obtained, a series of measures are proposed to improve the sustainable management of the PA and the socioeconomic development of its environment. The results of this study may be useful for PAs whose management tries to find a balance between conservation measures and the design of models that contribute to the socioeconomic development of their area of influence.
Źródło:
Oeconomia Copernicana; 2023, 14, 4; 1257-1302
2083-1277
Pojawia się w:
Oeconomia Copernicana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Growth, evapotranspiration and mineral content of gerbera under combined salinity and excess boron
Autorzy:
Gomez Bellot, M.J.
Carmassi, G.
Bartalucci, M.
Sanchez-Blanco, M.J.
Pardossi, A.
Powiązania:
https://bibliotekanauki.pl/articles/1959.pdf
Data publikacji:
2018
Wydawca:
Instytut Ogrodnictwa
Tematy:
gerbera
ornamental plant
cut flower
evapotranspiration
mineral content
salinity
boron
toxicity
sodium chloride
growth
flowering
nutrient uptake
Źródło:
Journal of Horticultural Research; 2018, 26, 2
2300-5009
Pojawia się w:
Journal of Horticultural Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Short-term effects of spent coffee grounds on the physical properties of two Mediterranean agricultural soils
Autorzy:
Cervera-Mata, A.
Martin-Garcia, J.M.
Delgado, R.
Parraga, J.
Sanchez-Maranon, M.
Delgado, G.
Powiązania:
https://bibliotekanauki.pl/articles/2082515.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
organic amendment
soil aggregate stability
soil water retention
soil aggregate size
SEM images
Opis:
We investigated the short-term effects of spent coffee grounds on the physical properties of two Mediterranean agricultural soils (Calcisol and Luvisol). The in vitro assay was performed with two spent coffee grounds doses (60 and 240 Mg ha-1), two incubation times (30 and 60 days) and two modalities: with and without lettuce seedlings (Lactuca sativa var. longifolia). Spent coffee grounds addition increased water retention at -33 and -1500 kPa, and decreased bulk density and plant-available water content. With spent coffee grounds, the percentage of macroaggregates increased, the percentage of meso- and microaggregates decreased and the structural stability of all types of aggregates increased. The stereomicroscopy images showed that: the structural aggregates were rounded, the porosity increased by 316%, the structure was ordered into smaller aggregates, the incorporation of spent coffee grounds particles could occur in intraped cracks and spent coffee grounds particles could act as a binding agent. Scanning electron microscopy also showed that spent coffee grounds particles interacted with mineral particles and integrated into soil structure; moreover, fungal hyphae also developed on many spent coffee grounds particles. If spent coffee grounds effects are compared with those described in the literature for other organic amendments, the same trend was observed in most of the soil physical properties although with a different intensity, principally with regard to structural stability.
Źródło:
International Agrophysics; 2019, 33, 2; 205-216
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural analysis of complex forms in the german baroque
Analiza konstrukcji złożonych form z okresu niemieckiego baroku
Autorzy:
Compan, V.
Camara, M.
Sanchez, J.
Powiązania:
https://bibliotekanauki.pl/articles/218429.pdf
Data publikacji:
2012
Wydawca:
Stowarzyszenie Konserwatorów Zabytków
Tematy:
powłoki konstrukcyjne
niemiecki barok
masonry shells
German Baroque
Opis:
Shells are forms that base their behaviour in their geometry. From Antiquity, the art of building is conceived as the ability to span and grew with little pieces, like bricks and stones, until great spaces could be closed. Arches, vaults and domes work mostly because their geometrical confi guration and not so much because their intrinsic strengthening. The complexity of Baroque domes has not been studied enough until now, at least in terms of structural analysis in conjunction with geometrical concepts. This is the reason because we have carried out a research in which geometry is considered as structure. We have studied a wide series of churches of the German Baroque and we present here two of them that maybe are the most surprising: the Chapel in the Monastery of Banz, by Johann Dientzenhofer, and The Fourteen Saints Basilica, by Balthasar Neumann. Their complex roofs, checked in situ, have been modeled using a 3D parametric design application and analysed by Finite Elements Analysis Method using ABAQUS. The main aim of this paper is to demonstrate that the basis of the optimal behaviour is the special geometry considered for each design. These geometries allow consider only membrane stresses instead of shell stresses. Bending is really acting in border and edges and not in the general surface as occurs in concrete and steel shells. Baroque was the inventor of membranes as we actually conceive them, with examples that present such complexity that none of the great concrete builders have tried to build.
Sklepienia łupinowe są formami, których zachowanie oparte jest na ich geometrii. Już od starożytności, sztuka budowania polegała na umiejętności tworzenia elementów konstrukcyjnych z niewielkich fragmentów, takich jak cegły czy kamienie, co pozwalało na zamknięcie wielkich przestrzeni. Łuki, sklepienia i kopuły funkcjonują głównie z racji swojej konfiguracji geometrycznej, a nie z powodu wewnętrznego wzmocnienia. Złożoność barokowych kopuł nie została jak do tej pory odpowiednio przestudiowana, przynajmniej pod względem analizy konstrukcji w połączeniu z koncepcjami geometrycznymi. Z tego też powodu przeprowadziliśmy badania, w których geometria została potraktowana jako konstrukcja. Przestudiowaliśmy szereg kościołów z okresu niemieckiego baroku i prezentujemy tutaj dwa z nich, które wydają się być najbardziej interesujące: Kaplicę z klasztoru w Banz, zaprojektowaną przez Johanna Dientzenhofera, oraz Bazylikę Czternastu Świętych Wspomożycieli Balthasara Neumanna. Ich złożone przekrycia, zbadane in situ, zostały zamodelowane z wykorzystaniem projektowania parametrycznego w 3D i przeanalizowane za pomocą metody elementów skończonych z zastosowaniem programu ABAQUS. Celem niniejszej pracy jest zademonstrowanie, iż podstawą optymalnej pracy konstrukcji jest geometria jej poszczególnych elementów, specyficzna dla każdego projektu. Ta geometria pozwala brać pod uwagę jedynie naprężenia membranowe zamiast naprężeń powłokowych. Zginanie oddziałuje na granicach i brzegach, a nie na całej powierzchni, jak to ma miejsce w przypadku powłok betonowych i stalowych. W baroku wynaleziono membrany w naszym rozumieniu tego pojęcia, a ich przykłady mają tak złożony charakter, iż żaden z twórców wielkich budowli z betonu nie próbował nic podobnego stworzyć.
Źródło:
Wiadomości Konserwatorskie; 2012, 32; 89-93
0860-2395
2544-8870
Pojawia się w:
Wiadomości Konserwatorskie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Filling the ceratosaur gap: A new ceratosaurian theropod from the Early Cretaceous of Spain
Autorzy:
Sanchez-Hernandez, B.
Benton, M.J.
Powiązania:
https://bibliotekanauki.pl/articles/945890.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
filling
ceratosaur gap
new theropod
theropod
ceratosaurian theropod
paleontology
Dinosauria
Theropoda
Ceratosauria
Barremian
Early Cretaceous
Cretaceous
Spain
Opis:
Ceratosaurian theropods evolved in two bursts, first in the Middle and Late Jurassic and then in the Late Cretaceous, leaving a 20 Myr gap in the Early Cretaceous during which remains are rare. We describe here a new ceratosaurian theropod, Camarillasaurus cirugedae, from fluvial deposits of the Camarillas Formation (lower Barremian, Lower Cretaceous) of Camarillas, Teruel Province, NE Spain. The new theropod is represented by a collection of associated bones, including a tooth, a possible cervical vertebra, two sternal plates, the proximal part of a right tibia, a broken right scapulocoracoid, the incomplete sacrum, five caudal vertebrae, an isolated caudal neural arch, a chevron, an almost complete presacral rib and some fragments of vertebrae, ribs, and other elements. Camarillasaurus is differentiated from other theropods by the extreme depth of the tibia proximal end, and a deep longitudinal groove on the tibia. The new dinosaur is a ceratosaur, phylogenetically close to the base of the clade, and perhaps more derived than the Chinese basal ceratosaur Limusaurus. The new taxon is significant in the evolution of the ceratosaurian dinosaurs, being placed temporally between its more common Jurassic and mid-Upper Cretaceous relatives, and it is one of only a few from Laurasia.
Źródło:
Acta Palaeontologica Polonica; 2014, 59, 3; 581-600
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect on Neutronic Calculations of Certain Alternative Fuels in a Boiling Water Reactor by Using MCNPX Monte Carlo Method
Autorzy:
Günay, M.
Sanchez Espinoza, V.
Travleev, A.
Powiązania:
https://bibliotekanauki.pl/articles/1401928.pdf
Data publikacji:
2015-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
28.41.-i
28.41.Ak
Opis:
We were studying on the modeling of boiling water reactor fuel assemblies at pin-by-pin level by using Monte Carlo method. The designed boiling water reactor system is cylinder, and the radius of the cylinder is 228 cm. The total active core height is 315.79 cm. The reactor core was divided into the square lattice 7 × 7 type with a constant pitch of 30 cm. The core was surrounded with the reflector. The reflector was surrounded by SS316LN ferritic steel with width of 3 cm. The mixtures 0.2-1% PuF₄ and PuO₂ were used as fuel. In this study, the effect on the neutronic calculations of PuF₄ and PuO₂ fuels was investigated in the designed boiling water reactor system. There were calculated k_{eff}, heat deposition and the fission energy in the designed boiling water reactor system. The three-dimensional (3D) modelling of the reactor core and fuel assembly into the designed boiling water reactor system was performed by using MCNPX-2.7.0 Monte Carlo method and the ENDF/B nuclear data library.
Źródło:
Acta Physica Polonica A; 2015, 128, 2B; B-110-B-112
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł

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